Boring and finishing device.



No. 883,133. v 'PATENTBD MAR. 24, 1908. T. W. GREEN.

BORING AND FINISHING DEVICE.

APPLICATION FILED DEO B. 1904.

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T. W.GREEN. BORING AND FINISHING DEVICE] APPLICATION FILED DEC. 8. 1904.

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UNITED STATES PATENT OFFICE.

THOMAS W. GREEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILBRAHAM-GREEN BLOWER COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

BORING AND FINISHING DEVICE.

Specification of Letters Patent.

Patented March 24, 1908.

Application filed December'S, 1904. Serial No. 236,056.

To all whom it may concern:

Be it known that I, THOMAS W. GREEN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and iuseful {Improvements in Boring and Finishing Devices, of which the following is a specification.

This invention relates to improvements in boring devices, and has particular reference to a new and useful device for boring rotating and oscillating articles, and consists primarily in a rotary tool provided at predetermined points thereon with suitable cutters, which tool is adapted to be geared to and co-act with the revolving or oscillating article to be bored or finished;

The invention is especially designed for boring and finishing the concave, convex, cycloidal, or plain surfaces of rotary blowers, pumps, engines, etc., and the operating parts thereof. To accomplish this end I provide a device such as hereinafter described, illustrated in the drawings, and more particularly pointed out in the claims hereunto appended.

In the drawings: Figure 1 shows a side elevation of the tool having the cutters secured thereon, at predetermined points, and an impeller blade of a rotary blower to be bored. and finished by said tool, said tool and blade being so arranged and geared together that.they will co-act in the operation of the device. Fig. 2 is a top plan view of Fig. 1. Fig. 3 is a view similar to that shown in Fig. 1, showing two impeller blades, instead of one, arranged to be bored and finished by the same tool at the same time, and Fig. 4 is a view, in side elevation, showing an impeller blade and the tool for boring and finishing the same mounted. for operation, and a mechanism for moving said tool longitudinally of the impeller blade during the boring and finishing operation.

Referring to the drawings, the numeral 1 indicates a suitable frame or support in which the tool and the article to be bored and finished are mounted.

2 indicates a revoluble shaft journaled in bearings 3, 3, in opposite sides of the frame or support 1, and is operated from any suitable source of power. Mounted 011 the shaft 2 is a tool 4, both said tool and shaftbeing adapted to move longitudinally, being actuated 1n the same manner as the tool 1n the usual form of boring mill, as shown in Fig. 4. The configuration or shape of the tool 4 will necessarily vary according to the particular work it may be desired to bore, but for the purpose of illustrating the present invention I have selected the form shown in the drawing,'which consists of two oppositely disposed enlarged heads 4, 4, connected by a web or waist portion 4". Each of the heads 4 is provided with, preferably, six

cutters, those on one head being designated by the letters a, b, 0, (Z, c, and j, while those on the opposite head. are designated by the letters a, b, 0, cl, 6, and f These cutters are secured in suitable sockets in the respective heads, and are set with their cutting edges in the directions shown in the drawings.

Revolubly mounted in bearings 5, 5, in the frame or support 1. is the impeller blade 6', or other article, to be bored or finished. The impeller blade 6 has one of its journals 7 extending out beyond the bearing on which is secured a suitable gear wheel 8 adapted to mesh with a corresponding gear wheel 9 on the revoluble shaft 2, whereby said shaft 2 and the tool 4 thereon and the impeller blade 6 are simultaneously rotated from the same source of power and always maintained in the same relative position to each other during a revolution, as is evident. The gear wheel 9 is secured on the shaft 2 by means of a spline or feather to permit a longitudinal movement of said shaft, as is apparent.

The impeller blade 6, herein illustrated, is provided with ei ht contact or looking surfaces which must be accurately and smoothly finished in order to perfectly co-act with a corresponding impeller blade. In the impeller blade herein shown the surfaces h, lc, m, and 0 are convex, the surfaces 9 and l concave, and the surfaces 0', and n, practically, plain.

The operation of the device is as follows: The impeller blade, which has been cast to the desired shape, and the contact surfaces of which. it is now desired to bore or finish, is mounted in the frame or support in the proper position, when the gears 8 and 9 will mesh, and when power is applied to the shaft 2, through the pulley 9, the tool and impeller blade will be simultaneously revolved, and at the same time the gear 10 on the ower pulley will operate the gear 12, which is mounted on a shaft 13 having at its opposite i of the impeller blade.

end a worm 14 which engages a gear 15 mounted on a shaft 16 on which is also mounted a gear 17 engaging the boring racl bar 18, whereby the tool is given a longitudinal movement, the tool thus being provided with both a rotary and longitudinal movement.

During the operation the cutter a contacts with and bores or finishes the convex surface m, the cutter b bores and finishes the rear end of the surface m and the beginning of the waist or concave surface Z, the cutter c bores and clears the concave surface Z, the cutter d bores and finishes the end of the concave surface Z and the rear end of the convex surface 75, the cutter e bores and finishes the convex surface 7c, and the cutter fbores and finishes the surface 2'. It will be seen that the correspondin cutter on the opposite head of the tool wilI bore and finish the surfaces 71, g, 0, and 'n on the opposite side When an impeller blade has been completely bored and finished. it is removed and replaced by another, and this operation is continued as long as it is desired.

I/Vhile I have described the operation of my im )roved tool on one impeller blade only, it wil be apparent that it will operate upon and finish two impeller blades, of identical configuration, at one and the same time, and I have, therefore, shown in Fig. 3 my improved finishing tool mounted between two impeller blades, as an illustration of the manner in which this double work may be accomplished, and it will be apparent that the opposite heads of the tool work alternately on each opposite impeller blade.

It will be evident that the shape of the tool and. the number and location of the cutters thereon may be greatly varied without departing from the spirit of my invention, and I do not, therefore, limit myself to either the configuration of the tool shown, the number or location of the cutters carried thereby, or the mechanism shown for giving said tool longitudinal movement.

Having thus described my invention what I claim is I 1. In a device for borin and finishing the convex, concave, or cycIoidal contact or locking surfaces of impeller blades for rotary blowers, the combination with a supporting frame and suitable rotary impeller-holding bearings mounted therein, of a combined slidable and rotary tool adapted to co-act with a rotary impeller-blade carried by said bearings to bore and finish the convex, concave, or cycloidal contact or locking surfaces of said impeller blade.

2. In a device for boring and finishing the convex, concave, or cycloidal contact or looking surfaces of, impeller blades for rotary blowers, the combination with a supporting frame and suitable rotary impeller-holding blowers, the combination with a supporting bearings mounted therein, of a longitudinally slidable rotary tool geared to said impellerholding bearings, and adapted during its sliding rotation to contact with and bore and finish the contact or looking surfaces of the impeller carried by said rotary bearings.

3. In a device for boring and finishing the convex, concave, or cycloidal contact or looking surfaces of impeller blades for rotary frame and suitable rotary impeller-holding bearings mounted therein, of a longitudinally slidable rotary tool-head geared with said impeller-holding bearings, a series of cutters mounted in said tool-head at predetermined points, said cutters being adapted during the sliding rotation of the tool-head to contact with and bore and finish the con.- vex, concave, or cycloidal locking surfaces of the impeller blade carried by said rotary bearings.

l. In a device for boring and finishing the convex, concave, or cycloidal contact or locking surfaces of impeller blades for rotary blowers, the combination with a supporting frame and suitable rotary impeller-holding bearings mounted therein, of a longitudinally slidable rotary tool-head, said tool-- head being of the same general shape as. the impeller blade to be bored and finished, a 5 series of cutters mounted in said tool-head, each cutter being so positioned and mounted as to bore and finish a particular portion of the contact or locking surface of the impeller blade during the co-acting rotation of said 0 impeller blade and tool-head, and means for rotating said tool-head and impeller blade.

5. In a device for boring and finishing the convex, concave, or cycloidal contact or looking surfaces of impeller blades for rotary blowers, the combination with a supporting frame and suitable rotary impeller-holding bearin s mounted therein, of a longitudinally slidable rotary tool-head being of the same general shape as the impeller blade to be bored and finished, a series of cutters mounted in said tool-head, each of said cutters being so positioned and mounted as to bore and finish a particular portion or surface of the impeller blade during the co-acting 1 5 rotation of said impeller blade and toolhead, gears connecting said tool-head and said rotary bearings whereby the relative position of the impeller blade to the toolhead will be maintained during the operation 12 of the device.

6. In a device for boring and finishing the convex, concave, or cycloidal contact or looking surfaces of impeller blades for rotary blowers, the combination with a supporting frame and suitable rotary impeller-holding bearings mounted therein, of a longitudinally slidable rotary tool geared with said ings, and means imparting a longitudinal movement to said tool, said tool being adapted during its sliding rotation to contact with and bore and finish the contact or looking surfaces of the impeller blade carried by said rotary bearings.

7. In a device for boring and finishing the convex, concave, or cycloidal contact or looking surfaces of impeller blades for rotary blowers, the combination with a supporting frame and suitable rotary impeller-holding bearings mounted therein, of a longitudinally slidable rotary tool-holding shaft and a boring and finishing tool rigidly mounted thereon, said shaft and bearings being so geared that the tool and the impeller carried by said bearings will both rotate and maintain their relative positions, and means for moving said shaft and tool longitudinally during their rotation, whereby the convex, concave, or cycloidal contact or locking surfaces of the impeller blade will be bored and finished.

8. In a device for boring and finishing the convex, concave, or cycloidal contact or locking surfaces of impeller blades for rotary blowers, the combination with a supporting frame, suitable rotary impeller-holding bearings mounted therein, and a suitable gear on one of said bearings, of a longitudinally slidable rotary tool-holding shaft, a gear splined on said shaft meshing with the gear on the bearing, a tool rigidly secured on said shaft, means for rotating said shaft and tool and the bearings, and means for giving said shaft and tool longitudinal movement during the rotation thereof. 7

9. In a device for boring and finishing the convex, concave, or cycloidal contact or locking surfaces of impeller blades for rotary blowers, the combination with a supporting frame, suitable rotary impeller-holding bearings mounted therein, and a suitable gear on one of said bearings, of a longitudinally slidable rotary tool-holding shaft, a gear splined on said shaft meshing with the gear on the bearing, a tool-head rigidly secured on said shaft, a series of cutters mounted in said toolhead, each cutter being so positioned and mounted as to bore and finish a particular portion of the contact or locking surface of the impeller to be operated upon, means for rotating said shaft and tool and the impellerholding bearings, and means for giving said shaft and tool longitudinal movement during the rotation thereof.

10. In a device of the character described, the combination with a supporting frame and rotary bearings mounted therein and adapt ed to carry the article to be operated upon, of a combined slidable and rotary tool, substantially of the same shape as the cross-section of the article to be operated upon, and means for simultaneously rotating in opposite directions the tool, and bearings and article carried thereby upon which said tool is adapted to operate, whereby said article is bored and finished by the tool during their co-acting rotation.

11. A device for boring and finishing the locking surfaces of impellers for rotary blowers, having in combination therewith a rotary tool having boring and finishing edges, said edges being so positioned that, when the tool and impeller to be bored and finished are simultaneously rotated, said edges will contact with the unfinished. locking surfaces of said impeller, whereby during the coacting rotation of said tool and impeller, the locking surfaces of the latter will be bored and finished by the boring and finishing edges of said tool.

12. A device for boring and finishing the locking sufaces of impellers for rotary blowers, having in combination therewith a rotary tool havin a plurality of boring and finishing edges, certain of said edges being at a greater distance from the center of rotation of said tool than certain of the other of said edges, said. edges being so positioned that, when the tool and impeller to be bored and finished are simultaneously rotated, said edges will contact with the unfinished locking surfaces of said impeller, whereby during the coacting rotation of said tool and impeller, certain of the locking surfaces of the latter will be bored and finished by certain of the boring and finishing edges of the tool.

13. A device for boring and finishing the locking surfaces of impellers for rotary blowers, having in combination therewith a tool adapted to have a combined rotary and longitudinally sliding movement and provided with boring and finishing edges, said edges being so positioned that, when the tool and impeller to be bored and finishedare simul taneously rotated, said edges will contact with the unfinished locking surfaces of said impeller, whereby during the coacting rotation of said" tool and impeller, the locking surfaces of the latter will be bored and finished by the combined longitudinal and rotary movements of said edges.

14. A device for boring and finishing the locking surfaces of an impeller for rotary blowers, having in combination therewith a tool of substantially the same general form in cross-section as that of the impeller to be bored and finished, and finishing edges so positioned thereon that, when said tool and. impeller to be bored and finished are simultaneously rotated, said edges will contact with the unfinished locking surfaces of said impeller, whereby during the coacting rotation of said tool and impeller, the locking surfaces of the latter will be bored and finished by the boring and finishing edges of said tool.

15. A device for boring and finishing the locking surfaces of impellers for rotary blowers, having in combination therewith a tool holder of substantially the same general form bored and finished, and finishing tools cartool having boring and finishing edges, said ried thereby and so positioned therein that, edges being so positioned that when the tool when said holder and impeller to be bored E and impeller to be bored and finished are and-finished are simultaneously rotated, said simultaneously rotated said edges will contools will contact with the unfinished locking tact with and bore and finish the locking sursurfaces of said impeller, whereby during the l faces of said co-acting impeller. eoacting rotation of said tool and impeller, In testimony whereof 1 afliX my signature, 20 the locking surfaces of the latter will be bored in presence of two subscribing Witnesses.

graished by said tools as said impeller is THOMAS WV GREEN 16. A device for boring and finishing the locking surfaces of impellers for rotary blowers having in combination therewith a rotary Witnesses TnoMAs D. MoWLDs, G-Eo. L. Ro'rE. 

